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(No Model.)

G. HILDRETH.

GORE FOR STRAIGHT WAY STOP VALVES. N0. 330,327. Patented Nov. 10, 1885 HF-L l 3 NH P A ,Fv'y% k w 3 WITNESSES QQ, MVEWTOR UNrrnn dramas arrmr rrren.

GEORGE HILDRETH, OF TROY, ASSIGNOR TO THE RENSSELAER MANUFAC- TURING COMPANY, OF LANSINGBURG, NEW YORK.

CORE FOR STRAIGHT-WAY STOP-VALVES.

SPECIFICATION forming part of Letters Patent No. 330,327, dated November 10,1885.

(No model.)

To ail whom it may concern:

Be it known that I, GEORGE HILDRETH, of Troy, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in the Method of Making Cores for Straight-Way Stop-Valves; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in which Figure 1 represents a View of the stem-core, in one part of a two-part core-box, in which it is formed; Fig. 2, a view of a longitudinal section of one of the arm-cores, in one part of a two-part core-box, in which it is formed; Fig. 3, one of the arm-cores complete, and Fig. 4. the stem=core with one of the arm-cores in place. Fig. 5 is a transverse section on the line :0 a: of Fig. 4.

The invention relates to improvements in cores employed in casting the casings of T- shaped straight-Way valves; and it consists in providing the core of the stem of the casing, near the end that forms the bottom of the interior of the latter, with opposite lateral and outwardly-tapering arms, upon which are secured the cores of the arms of the casing, the said cores being provided with tapering recesscs corresponding with the tapered arms of the stem-core,and secured in place thereon by paste, cement, or other proper means. In making large cores a bolt may be passed through the axes of the arm-cores and through the stem-core and have a nut on its threaded end to hold it in place.

Referring to the accompanying drawings by letter, A designates the core of the stem of the casing provided with the parts a, a, and c of different diameters to make the interior of the casing of a certain shape, though any desired shape maybe given thereto.

B B are similar oppositetapered arms standing at right angles outwardly from the stemcore,near its lower end,and made in one piece therewith. The core Ais rounded at its lower end, I), and has a recess, 1), made centrally therein, so thata central stop-lug may be cast upon the interior of the bottom of the easing. This recess may, however, be onthe side of the casing, if preferred. The core A is made in a two-part core-box (one part of which is shown in Fig. 1) and baked separately.

O G are the cores for the arms of the valvecasing, each provided with the longitudinal recess D, which tapers from one end inwardly to correspond with the taper of the arm B, upon .which it is fitted, but is somewhat longer than said arm, so that the arm-core can be set upon the arm B with its end accurately fitted against the surface of the stem-core, without the end of this arm binding against the bottom of the recess' The stem-core is flattened at the points where the arm-cores impinge against it, so as to form the fiatvalveseats at the ports for the gates of the valve. Each arm-oore is provided near its open end with a circumferential bead, d, which forms a corresponding groove on the interior of one arm of the valve-casing.

Fig. 2 shows a conical plug, X, used in conjunction with a two-part core-box to form the recess in the arm-core, the baseplate X of the plug resting in a circumferential rabbet in the end of the core-box. This plug, forming the recess of the arm-cores, may extend entirely therethrough if it is necessary to use a bolt to fasten the arm-cores to the main core.

The arm-cores are baked separately from the stem-core, and are then fitted and put in place, and cemented or otherwise secured on the arms B, as described, thus forming a united core for the whole interior of the valvecasing. If preferred, the main core and each of the arm-cores may be made in longitudinal halves, cemented together, instead of being formed in one mass in the core-box.

The arm-cores are preferably of equal diameter throughout their length, but may, if desired, be made conical; and the stem-core is made flat where the arm-cores join it, so as to form fiat valve-seats for the gates of the straight-way Valves.

I am aware that the stem-core and arm-cores have been made separately and afterward connected together. This construction is shown more particularly in cases where metal rings, intended to unite with and form the valveseafs of the casing, are placed upon the parts of the core that form the interior of the arms ofthe casing. Itherefore do notclaim,broadly, [bination of the stem-core A, provided with 20 a core made in the three said parts; but

What I claim isl. A core adapted to form the interior of a T-shaped casing for astraight-Way valve, and composed of a stem portion flattened on opposite sides near the end that forms the bottom of the interior of the casing, and having opposite lateral outwardly-tapered arms stand- 10 ing from its flattened surfaces, and arm portions, each provided with a longitudinal recess, tapered from one end, and fitted and cemented upon one of the arms of the stem portion,with the open end of the arm portion r 5 abutting against the flattened portion of the stem portion to form a valve-seat, substantially as specified.

2. In a core for the interiorof the T-shaped casing of a straight-Way stop-valve, the comthe opposite tapering arms, B, rising from its flattened portions, and having a recess, b, on the center of its lower end to' form a stop-lug for the valve-gates, and the arm-cores 0, each provided with the longitudinal recess D,taper- 2 5 ing inwardly to correspond with the taper of the arms B, and longer than the arm upon which it fits, and is cemented to prevent the end of the arm binding against its bottom when the end of the arm-core abuts against 0 the stem-core, substantially as specified.

In testimony that I claim the foregoing as my own invention I affiig my signature in presence of two witnesses.

, GEORGE HILDRETH.

Witnesses: Geo. D. COOPER, NELsoN H. HYDOM. 

